there is so much i don't know about world history.
i wish i knew it all so i can do my own way of calculating...like...
United States + France = Canada
The United States attacked Canada twice.
The United States revolted against Britain in 1776. Since Britain and France were long-time bitter enemies, France supported the United States.
The United States, lacking a navy capable of attacking Britain (the Royal Navy was the most powerful in the world), they attacked the closest thing British: Canada (which was at that time a colony of Britain).
The second time was in 1812. Napoleon was ravaging Europe and the British were pouring in a lot of its military to stop Napoleon, leaving colonies like Canada virtually undefended. The United States saw this as an opportunity to "liberate" Canada. Thomas Jefferson called it a "matter of marching" in that Canada would literally be so easy to take that the Americans would just have to march into it.
The Americans attacked and there were only a few thousand Canadian militiamen under General Sir Isaac Brock with their Native allies (Tecumseh, a Native American chief that rebelled against the US when they basically put guns to the Natives heads, forcing them to sell off their land to the United States. Tecumseh allied with the British against the US).
If it wasn't for the ingenious tactics of Sir Isaac Brock, Canada would be American right now. In one instance, Canada took Detroit without firing a shot. The Americans had Fort Detroit well defended but they were absolutely terrified of the Natives. Sir Isaac Brock wrote a fake letter and sent it with a messenger so it could be intercepted by the Americans. In it, he wrote of thousands of Natives massing to attack Detroit. The Americans surrendered to Brock without a shot. Unfortunately, Brock was killed at the Battle of Queenston Heights and other tragedies befell Canada like the burning and sacking of York (present-day Toronto). But a force of British seamen and Canadian militia stormed Washington D.C. and burned down the White House.
....And now we're all a big happy family